// 1999-10-11 bkoz // Copyright (C) 1999, 2000 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 2, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING. If not, write to the Free // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, // USA. // As a special exception, you may use this file as part of a free software // library without restriction. Specifically, if other files instantiate // templates or use macros or inline functions from this file, or you compile // this file and link it with other files to produce an executable, this // file does not by itself cause the resulting executable to be covered by // the GNU General Public License. This exception does not however // invalidate any other reasons why the executable file might be covered by // the GNU General Public License. // 27.5.2 template class basic_streambuf #include // for memset, memcmp #include #include #include class testbuf : public std::streambuf { public: // Typedefs: typedef std::streambuf::traits_type traits_type; typedef std::streambuf::char_type char_type; testbuf(): std::streambuf() { _M_mode = (std::ios_base::in | std::ios_base::out); } bool check_pointers() { bool test = true; VERIFY( this->eback() == NULL ); VERIFY( this->gptr() == NULL ); VERIFY( this->egptr() == NULL ); VERIFY( this->pbase() == NULL ); VERIFY( this->pptr() == NULL ); VERIFY( this->epptr() == NULL ); return test; } int_type pub_uflow() { return (this->uflow()); } int_type pub_overflow(int_type __c = traits_type::eof()) { return (this->overflow(__c)); } int_type pub_pbackfail(int_type __c) { return (this->pbackfail(__c)); } void pub_setg(char* beg, char* cur, char *end) { this->setg(beg, cur, end); } void pub_setp(char* beg, char* end) { this->setp(beg, end); } protected: int_type underflow() { int_type __retval = traits_type::eof(); if (this->gptr() < this->egptr()) __retval = traits_type::not_eof(0); return __retval; } }; void test01() { typedef testbuf::traits_type traits_type; typedef testbuf::int_type int_type; bool test = true; char* lit01 = "chicago underground trio/possible cube on delmark"; testbuf buf01; // 27.5.2.1 basic_streambuf ctors // default ctor initializes // - all pointer members to null pointers // - locale to current global locale VERIFY( buf01.check_pointers() ); VERIFY( buf01.getloc() == std::locale() ); // 27.5.2.3.1 get area // 27.5.2.2.3 get area // 27.5.2.4.3 get area int i01 = 3; buf01.pub_setg(lit01, lit01, (lit01 + i01)); VERIFY( i01 == buf01.in_avail() ); VERIFY( buf01.pub_uflow() == lit01[0] ); VERIFY( buf01.sgetc() == traits_type::to_int_type(lit01[1]) ); VERIFY( buf01.pub_uflow() == lit01[1] ); VERIFY( buf01.sgetc() == traits_type::to_int_type(lit01[2]) ); VERIFY( buf01.pub_uflow() == lit01[2] ); VERIFY( buf01.sgetc() == traits_type::eof() ); // pbackfail buf01.pub_setg(lit01, lit01, (lit01 + i01)); VERIFY( i01 == buf01.in_avail() ); int_type intt01 = traits_type::to_int_type('b'); VERIFY( traits_type::eof() == buf01.pub_pbackfail(intt01) ); // overflow VERIFY( traits_type::eof() == buf01.pub_overflow(intt01) ); VERIFY( traits_type::eof() == buf01.pub_overflow() ); VERIFY( buf01.sgetc() == traits_type::to_int_type(lit01[0]) ); // sputn/xsputn char* lit02 = "isotope 217: the unstable molecule on thrill jockey"; int i02 = std::strlen(lit02); char carray[i02 + 1]; std::memset(carray, 0, i02 + 1); buf01.pub_setp(carray, (carray + i02)); buf01.sputn(lit02, 0); VERIFY( carray[0] == 0 ); VERIFY( lit02[0] == 'i' ); buf01.sputn(lit02, 1); VERIFY( lit02[0] == carray[0] ); VERIFY( lit02[1] == 's' ); VERIFY( carray[1] == 0 ); buf01.sputn(lit02 + 1, 10); VERIFY( std::memcmp(lit02, carray, 10) == 0 ); buf01.sputn(lit02 + 11, 20); VERIFY( std::memcmp(lit02, carray, 30) == 0 ); #ifdef DEBUG_ASSERT assert(test); #endif } void test02() { typedef testbuf::traits_type traits_type; typedef testbuf::int_type int_type; bool test = true; char* lit01 = "chicago underground trio/possible cube on delmark"; testbuf buf01; // 27.5.2.1 basic_streambuf ctors // default ctor initializes // - all pointer members to null pointers // - locale to current global locale VERIFY( buf01.check_pointers() ); VERIFY( buf01.getloc() == std::locale() ); // 27.5.2.2.5 Put area size_t i01 = traits_type::length(lit01); char carray01[i01]; std::memset(carray01, 0, i01); buf01.pub_setg(lit01, lit01, lit01 + i01); buf01.sgetn(carray01, 0); VERIFY( carray01[0] == 0 ); buf01.sgetn(carray01, 1); VERIFY( carray01[0] == 'c' ); buf01.sgetn(carray01 + 1, i01 - 1); VERIFY( carray01[0] == 'c' ); VERIFY( carray01[1] == 'h' ); VERIFY( carray01[i01 - 1] == 'k' ); #ifdef DEBUG_ASSERT assert(test); #endif } // test03 // http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00151.html template > class basic_nullbuf : public std::basic_streambuf { protected: virtual int_type overflow(int_type c) { return traits::not_eof(c); } }; typedef basic_nullbuf nullbuf; typedef basic_nullbuf wnullbuf; template char print(const T& x) { nullbuf ob; std::ostream out(&ob); out << x << std::endl; return (!out ? '0' : '1'); } void test03() { bool test = true; const std::string control01("11111"); std::string test01; test01 += print(true); test01 += print(3.14159); test01 += print(10); test01 += print('x'); test01 += print("pipo"); VERIFY( test01 == control01 ); #ifdef DEBUG_ASSERT assert(test); #endif } int main() { test01(); test02(); test03(); return 0; }